In the comments of the video, they proclaim to be a Fast_SPI user.

Archive FastLED Archive
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In the comments of the video, they proclaim to be a Fast_SPI user. They are screen grabbing Winamp with Processing and then using a teensy 2.0 to control the LED’s.
http://www.youtube.com/watch?v=hJ-QSR3QT5Y

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Very interesting. How do you do realtime transfer of PC graphics data with processing?

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http://processing.org/reference/libraries/video/

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Great Share!